Display screen with an icon



The FIGURE is a front view of a display screen with an icon.

The broken line immediately surrounding the icon showing of the portion of the icon is included for the purpose of illustrating portions of the display screen with an icon. The outermost broken line surrounding the icon showing of the display screen is included for the purpose of illustrating environmental structure. The broken lines form no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen with an icon, as shown and described. 